feat: Add-blockscout_params (#838)

fix #837 
the default blockscout image version does not work on my machine. 
so i added the blockscout_params for blockscout service. now user can
customize the image versions they want to use.
it contains two params:
```yaml
blockscout_params:
  # blockscout docker image to use
  # Defaults to the latest image
  image: "blockscout/blockscout:latest"
  # blockscout smart contract verifier image to use
  # Defaults to ghcr.io/blockscout/smart-contract-verifier:v1.9.0
  verif_image: "ghcr.io/blockscout/smart-contract-verifier:v1.9.0"
```

i already tested it on my machine and it worke well.

---------
Co-authored-by: Barnabas Busa <barnabas.busa@ethereum.org>
Co-authored-by: Barnabas Busa <busa.barnabas@gmail.com>

README.md

@@ -634,6 +634,15 @@ additional_services:
   - apache
   - tracoor
 
+# Configuration place for blockscout explorer - https://github.com/blockscout/blockscout
+blockscout_params:
+  # blockscout docker image to use
+  # Defaults to blockscout/blockscout:6.8.0
+  image: "blockscout/blockscout:6.8.0"
+  # blockscout smart contract verifier image to use
+  # Defaults to ghcr.io/blockscout/smart-contract-verifier:v1.9.0
+  verif_image: "ghcr.io/blockscout/smart-contract-verifier:v1.9.0"
+
 # Configuration place for dora the explorer - https://github.com/ethpandaops/dora
 dora_params:
   # Dora docker image to use

main.star

@@ -508,6 +508,7 @@ def run(plan, args={}):
             plan.print("Successfully launched beacon metrics gazer")
         elif additional_service == "blockscout":
             plan.print("Launching blockscout")
+            blockscout_params = args_with_right_defaults.blockscout_params
             blockscout_sc_verif_url = blockscout.launch_blockscout(
                 plan,
                 all_el_contexts,
@@ -516,6 +517,7 @@ def run(plan, args={}):
                 args_with_right_defaults.port_publisher,
                 index,
                 args_with_right_defaults.docker_cache_params,
+                blockscout_params,
             )
             plan.print("Successfully launched blockscout")
         elif additional_service == "dora":

src/blockscout/blockscout_launcher.star

@@ -2,8 +2,6 @@ shared_utils = import_module("../shared_utils/shared_utils.star")
 constants = import_module("../package_io/constants.star")
 postgres = import_module("github.com/kurtosis-tech/postgres-package/main.star")
 
-IMAGE_NAME_BLOCKSCOUT = "blockscout/blockscout:6.8.0"
-IMAGE_NAME_BLOCKSCOUT_VERIF = "ghcr.io/blockscout/smart-contract-verifier:v1.9.0"
 POSTGRES_IMAGE = "library/postgres:alpine"
 
 SERVICE_NAME_BLOCKSCOUT = "blockscout"
@@ -46,6 +44,7 @@ def launch_blockscout(
     port_publisher,
     additional_service_index,
     docker_cache_params,
+    blockscout_params,
 ):
     postgres_output = postgres.run(
         plan,
@@ -68,6 +67,7 @@ def launch_blockscout(
         port_publisher,
         additional_service_index,
         docker_cache_params,
+        blockscout_params,
     )
     verif_service_name = "{}-verif".format(SERVICE_NAME_BLOCKSCOUT)
     verif_service = plan.add_service(verif_service_name, config_verif)
@@ -84,6 +84,7 @@ def launch_blockscout(
         port_publisher,
         additional_service_index,
         docker_cache_params,
+        blockscout_params,
     )
     blockscout_service = plan.add_service(SERVICE_NAME_BLOCKSCOUT, config_backend)
     plan.print(blockscout_service)
@@ -96,7 +97,11 @@ def launch_blockscout(
 
 
 def get_config_verif(
-    node_selectors, port_publisher, additional_service_index, docker_cache_params
+    node_selectors,
+    port_publisher,
+    additional_service_index,
+    docker_cache_params,
+    blockscout_params,
 ):
     public_ports = shared_utils.get_additional_service_standard_public_port(
         port_publisher,
@@ -105,6 +110,7 @@ def get_config_verif(
         0,
     )
 
+    IMAGE_NAME_BLOCKSCOUT_VERIF = blockscout_params.verif_image
     return ServiceConfig(
         image=shared_utils.docker_cache_image_calc(
             docker_cache_params,
@@ -134,6 +140,7 @@ def get_config_backend(
     port_publisher,
     additional_service_index,
     docker_cache_params,
+    blockscout_params,
 ):
     database_url = "{protocol}://{user}:{password}@{hostname}:{port}/{database}".format(
         protocol="postgresql",
@@ -151,6 +158,8 @@ def get_config_backend(
         1,
     )
 
+    IMAGE_NAME_BLOCKSCOUT = blockscout_params.image
+
     return ServiceConfig(
         image=shared_utils.docker_cache_image_calc(
             docker_cache_params,

src/package_io/input_parser.star

@@ -75,6 +75,7 @@ ATTR_TO_BE_SKIPPED_AT_ROOT = (
     "network_params",
     "participants",
     "mev_params",
+    "blockscout_params",
     "dora_params",
     "docker_cache_params",
     "assertoor_params",
@@ -92,6 +93,7 @@ def input_parser(plan, input_args):
     sanity_check.sanity_check(plan, input_args)
     result = parse_network_params(plan, input_args)
     # add default eth2 input params
+    result["blockscout_params"] = get_default_blockscout_params()
     result["dora_params"] = get_default_dora_params()
     result["docker_cache_params"] = get_default_docker_cache_params()
     result["mev_params"] = get_default_mev_params(
@@ -136,6 +138,10 @@ def input_parser(plan, input_args):
         if attr not in ATTR_TO_BE_SKIPPED_AT_ROOT and attr in input_args:
             result[attr] = value
         # custom eth2 attributes config
+        elif attr == "blockscout_params":
+            for sub_attr in input_args["blockscout_params"]:
+                sub_value = input_args["blockscout_params"][sub_attr]
+                result["blockscout_params"][sub_attr] = sub_value
         elif attr == "dora_params":
             for sub_attr in input_args["dora_params"]:
                 sub_value = input_args["dora_params"][sub_attr]
@@ -355,6 +361,10 @@ def input_parser(plan, input_args):
         )
         if result["mev_params"]
         else None,
+        blockscout_params=struct(
+            image=result["blockscout_params"]["image"],
+            verif_image=result["blockscout_params"]["verif_image"],
+        ),
         dora_params=struct(
             image=result["dora_params"]["image"],
             env=result["dora_params"]["env"],
@@ -999,6 +1009,13 @@ def default_participant():
     }
 
 
+def get_default_blockscout_params():
+    return {
+        "image": "blockscout/blockscout:6.8.0",
+        "verif_image": "ghcr.io/blockscout/smart-contract-verifier:v1.9.0",
+    }
+
+
 def get_default_dora_params():
     return {
         "image": "ethpandaops/dora:latest",

src/package_io/sanity_check.star

@@ -171,6 +171,10 @@ SUBCATEGORY_PARAMS = {
         "devnet_repo",
         "prefunded_accounts",
     ],
+    "blockscout_params": [
+        "image",
+        "verif_image",
+    ],
     "dora_params": [
         "image",
         "env",